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Motor Driver TI recommendation

Other Parts Discussed in Thread: DRV832X, DRV8320, DRV8320R, DRV8323, DRV8323R, CSD18514Q5A, CSD18543Q3A, CSD88539ND, CSD88584Q5DC, CSD88537ND

Hello:

At present,the main technical parameters of the brushless DC motor used in our skylight are as follows:

Number of magnetic poles of motor: 8 poles

Normal operating voltage range: 9 ~ 16V;

Normal operating temperature range: - 40 ℃ ~ 90 ℃;

At 23 ℃ room temperature and 13V nominal voltage, the locked rotor current is 15a and the maximum working current is 6A;

At 23 ℃ room temperature and 16V voltage, the locked rotor current is 18.5a;

At -40 ℃ low temperature and 16V voltage, The locked rotor current is 24a ;

At -40 ℃ room temperature and 13V nominal voltage, The maximum working current is 8A;

During the model selection device of sunroof control module of one to one MOS scheme,The basic information about the drive chip and MOS tube of competitive products used in the market is as follows: :

1. Main parameters of MOS driver chip used by competitive product control module:

Number of Actuators & output terminals: 2 drivers & 2 output;

Input power supply voltage VS range: 5.5V to 40V;

Input power supply voltage VCC range: 3.0V to 5.5V;

Working power supply current & standby current: 6.4 MA (max) & 10uA (max);

Output voltage range: - 4 V to 40 V;

Output current gate driver current: 31ma (max);

Drain source on resistance RDS_ on_ gate:20 Ohms(Max)@25℃;

SPI clock:7MHz (Max) 16bit;

Charge Pump Operating Frequency:667KHz(Max);

Operating temperature range: - 40 ℃ to 125 ℃

Supplement: independent control of low side and high side n-MOSFETs

2. Main parameters of single cell MOS transistor used by competitive product control module:

Transistor polarity & channel mode: n-channel & enhancement;

VDS drain source breakdown voltage: 40V;

ID continuous drain current: 71 A@25 ℃, 50A@100 ℃;

RDS on drain source on resistance: 5.3 MOhms (max) @ 10V;

VGS - grid source voltage: ± 20 V;

VGS th gate source threshold voltage: 2.5 V (min);

QG gate charge: 16 NC;

PD power dissipation: 50 W@25 ℃, 25W@100 ℃;

Descent time: 8 ns;

Rise time: 72 ns;

Forward diode voltage drop: 1.2V (max);

Operating temperature range: - 55 ℃ to 175 ℃;

3. Main parameters of dual cell MOS transistor used by competitive product control module:

Transistor polarity & channel mode: n-channel & enhancement;

VDS drain source breakdown voltage: 40V;

ID continuous drain current: 40 A@25 ℃, 40A@100 ℃;

RDS on drain source on resistance: 6 MOhms (max) @ 10V;

VGS - grid source voltage: ± 20 V;

VGS th gate source threshold voltage: 1.5 V (min);

QG gate charge: 17 NC;

PD power dissipation: 71 W@25 ℃;

Descent time: 10 ns;

Rise time: 4.3 ns;

Forward diode voltage drop: 1.3V (max);

Operating temperature range: - 55 ℃ to 175 ℃;

The above are the main technical parameters provided for the device selection. We also hope that your company can provide a reference for the device selection of competitive drive chips and MOS tubes. Thank you.

  • Hi Jimmy, 

    For the motor driver, we recommend using the DRV832x device, which is a gate driver that translates PWM signals from an MCU to gate outputs to drive the MOS tubes for your motor. It operates up to 60-V recommended maximum and sources up to 1-A peak current and sinks up to 2-A peak current. 

    DRV8320 - no CSAs
    DRV8320R - no CSAs and integrated buck regulator 
    DRV8323 - includes 3x CSAs
    DRV8323R - includes 3x CSAs and integrated buck regulator 

    I will forward to the FET team for suggestions on MOS tube selection. 

    Thanks,
    Aaron

  • Hi Jimmy,

    Thanks for the inquiry. Do the FETs need to be automotive qualified? If so, then TI does not have any auto-qualified FETs and we do not plan to qual any of our devices to automotive standards. I am including a link below for TI FET selection tool for BLDC applications. It allows the user to compare up to 3 different TI FET solutions based on power loss. For single, 40V FET, the CSD18514Q5A in 5x6mm SON package is the lowest cost that meets the requirements. It is 4.9mΩ max at VGS = 10V. Our 40V power block with dual MOSFETs in half bridge is the CSD88584Q5DC in 5x6mm SON package. It's overkill for this application and is much higher cost. For a smaller solution size, the CSD18543Q3A is 9.9mΩ, 60V FET. We also have a couple of 60V dual FETs in SO8: CSD88537ND & CSD88539ND but these are higher on resistance. Again, none of these are automotive qualified.

    BLDC FET selection tool link: https://www.ti.com/tool/MOTOR-DRIVE-FET-LOSS-CALC

    Best Regards,

    John Wallace

    TI FET Applications

  • Hi Aaron:

    Sorry, I made a mistake. It's the sunroof brush DC motor currently used by our company are as follows,not brushless,Other parameters are the same. Please help recommend, Thank you!!

  • Hi John:

    Sorry, I made a mistake. It's the sunroof brush DC motor currently used by our company are as follows,not brushless,Other parameters are the same. Please help recommend suitable MOSFET, At present, the selected components need aec-q vehicle specification Level certification, Thank you!!

  • Hi Jimmy,

    As I pointed out in my previous response, TI has no aec-q, automotive qualified FETs. As such, we have no MOSFET for this application.

    Best Regards,

    John

  • Hello Aaron:

    Sorry, I made a mistake. It's the sunroof brush DC motor currently used by our company are as follows,not brushless,Other parameters are the same. Please help recommend, Thank you!!

    The customer's previous research TI brand driver chip has DRV8702QRHBRQ1, DRV8705SQRHBRQ1, DRV8706SQRHBRQ1. Is it suitable?

  • Hello Aaron:

    Sorry, I made a mistake. It's the sunroof brush DC motor currently used by our company are as follows,not brushless,Other parameters are the same. Please help recommend, Thank you!!

    The customer's previous research TI brand driver chip has DRV8702QRHBRQ1, DRV8705SQRHBRQ1, DRV8706SQRHBRQ1. Is it suitable?

  • Hello, Jimmy, 

    According to the requirement:

    "Normal operating voltage range: 9 ~ 16V;

    Normal operating temperature range: - 40 ℃ ~ 90 ℃;

    At 23 ℃ room temperature and 13V nominal voltage, the locked rotor current is 15a and the maximum working current is 6A;

    At 23 ℃ room temperature and 16V voltage, the locked rotor current is 18.5a;

    At -40 ℃ low temperature and 16V voltage, The locked rotor current is 24a ;

    At -40 ℃ room temperature and 13V nominal voltage, The maximum working current is 8A;"

    I would think the external FET gate driver solution DRV8702QRHBRQ1, DRV8705SQRHBRQ1, DRV8706SQRHBRQ1 are suitable.

    In the datasheet, the " IDRIVE Calculation Example" and "Power Dissipation" section can help customer to select the power MOSFET.

    Regards,

    Wang Li